<div class="form-group">
  <%= f.label :amount, Spree.t(:amount) %>
  <div class="input-group">
    <%= f.text_field :amount, class: 'form-control', required: true %>
    <div class="input-group-append">
      <span class="input-group-text"><%= currency_symbol(@order.currency) %></span>
    </div>
  </div>
</div>
<div class="form-group mb-0">
  <%= f.label :refund_reason_id, Spree.t(:reason) %>
  <%= f.collection_select(:refund_reason_id, refund_reasons, :id, :name, { include_blank: true }, { data: { controller: 'autocomplete-select' }, required: true }) %>
  <%= f.error_message_on :reason %>
</div>